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  <div id="layout-content"><div id="function.decoct" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">decoct</h1>
   <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">decoct</span> &mdash; <span class="dc-title">十进制转换为八进制</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.decoct-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>decoct</strong></span>(<span class="methodparam"><span class="type">int</span> <code class="parameter">$num</code></span>): <span class="type">string</span></div>

  <p class="para rdfs-comment">
   返回一字符串，包含有给定 <code class="parameter">num</code> 参数的八进制表示。可以转换的最大数字取决于平台。对于
   32 位平台通常是十进制的 <code class="literal">4294967295</code>，结果是 <code class="literal">37777777777</code>。对于
   64 位平台通常是十进制的 <code class="literal">9223372036854775807</code>，结果是 <code class="literal">777777777777777777777</code>。
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.decoct-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">num</code></dt>

     <dd>

      <p class="para">
       待转换的十进制值
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.decoct-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   <code class="parameter">num</code> 参数八进制表示的字符串。
  </p>
 </div>

 <div class="refsect1 examples" id="refsect1-function.decoct-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-3090">
    <p><strong>示例 #1 <span class="function"><strong>decoct()</strong></span> 示例</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #0000BB">decoct</span><span style="color: #007700">(</span><span style="color: #0000BB">15</span><span style="color: #007700">)&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo&nbsp;</span><span style="color: #0000BB">decoct</span><span style="color: #007700">(</span><span style="color: #0000BB">264</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
17
410
</pre></div>
    </div>
   </div>
  </p>
 </div>

 <div class="refsect1 seealso" id="refsect1-function.decoct-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.octdec.html" class="function" rel="rdfs-seeAlso">octdec()</a> - 八进制转换为十进制</span></li>
    <li class="member"><span class="function"><a href="function.decbin.html" class="function" rel="rdfs-seeAlso">decbin()</a> - 十进制转换为二进制</span></li>
    <li class="member"><span class="function"><a href="function.dechex.html" class="function" rel="rdfs-seeAlso">dechex()</a> - 十进制转换为十六进制</span></li>
    <li class="member"><span class="function"><a href="function.base-convert.html" class="function" rel="rdfs-seeAlso">base_convert()</a> - 在任意进制之间转换数字</span></li>
   </ul>
  </p>
 </div>

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